Server Rack Power Distribution for Phase Load Balancing
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Solution Overview
Problem
Existing server rack systems using three-phase power supply networks face challenges in maintaining balanced loading across phases, leading to potential shifts in the reference ground level due to imbalanced power supply currents.
Innovation Solution
A server rack system that converts three-phase AC power into three single-phase power signals, distributing these signals to corresponding power supply circuits to balance the load across each phase, thereby maintaining a stable reference ground level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If three-phase power supply is used to increase driving capacity, then power delivery capability is improved, but loading balance across phases deteriorates
Solution Approach 1:
The patent segments the three-phase power distribution into three independent single-phase power supply circuits, each handling one phase separately. This segmentation allows independent control and monitoring of each phase's loading, making it possible to detect and correct imbalances by adding dummy loads to under-loaded phases.
Solution Approach 2:
The patent changes the operational parameter of the power supply system by introducing adjustable dummy loads that can dynamically modify the loading characteristics of each phase. By varying the resistance values of these dummy loads, the system can compensate for imbalances and maintain equal loading across all three phases.
2Power
If three-phase power supply is used to drive server rack system, then power delivery capability is improved, but reference ground level stability deteriorates
Solution Approach 1:
The patent separates the three-phase power supply into three independent single-phase circuits with individual dummy loads for each phase. This segmentation allows independent stabilization of each phase, preventing ground level shifts caused by phase imbalances while maintaining the overall three-phase power delivery capability.
Solution Approach 2:
By adding dummy loads to balance the loading across all three phases, the patent creates equipotential conditions that prevent reference ground level shifts. The balanced loading ensures that no single phase dominates the neutral point, maintaining stable ground potential throughout the system.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively balances the load on the three-phase power supply network, preventing shifts in the reference ground level and ensuring stable operation by distributing power evenly across single-phase power supply circuits.
Implementation Method 1
a voltage converter for converting a three-phase alternating current (AC) power signal into three single-phase power signals
Data Source
AI summary
A rack system for a server includes a number of server units, which includes first to the third sets of server units, voltage converter, first to third power supply circuits. The voltage converter receives and converters a three-phase alternating current (AC) power signal to provide first to third single-phase power signals. The first to the third sets of power supply circuits respectively provides firs to third direct current (DC) power signals according to the first to the third single-phase power signals. The first set to the third set of server units is respectively powered by first to the third DC power signals or respectively powered by first part, second part, and third part of the first to the third DC power signals.